Z80189 Datasheet, PDF (20/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PRELIMINARY
16550 MIMIC TIMING (Continued)
/HA3 - /HA9
Valid
HAEN
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
/HRD
/HWR
1
2
3
4
5
6
Figure 21. Com Port Decode Mode
PC Host /RD /WR Timing
No Symbol
1 tsAR
2 tsCSR
3 tsAW
4 tsCSW
5 tAh
6 tCSh
Table 4. Com Port Decode Mode
PC Host /RD /WR Timing Table
Parameter
Z8L189-20 MHz
Min
Max
H Address to/HRD Fall Setup
30
/HCS to /HRD Fall Setup
30
H Address to /HWR Fall Setup
30
/HCS to /HRD Fall Setup
30
H Address from /HRD /HWR Hold 20
/HCS from /HRD /HWR Hold
20
Z80189-33 MHz
Min
Max
30
30
30
30
20
20
Units
ns
ns
ns
ns
ns
ns
20
DS971890301